1427987177721 has 24 divisors (see below), whose sum is σ = 2221355485440. Its totient is φ = 878744686176.

The previous prime is 1427987177711. The next prime is 1427987177761. The reversal of 1427987177721 is 1277717897241.

1427987177721 is a `hidden beast` number, since 1 + 427 + 9 + 8 + 71 + 77 + 72 + 1 = 666.

It is not a de Polignac number, because 1427987177721 - 2⁵ = 1427987177689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1427987177711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9453430 + ... + 9603296.

It is an arithmetic number, because the mean of its divisors is an integer number (92556478560).

Almost surely, 2^{1427987177721} is an apocalyptic number.

It is an amenable number.

1427987177721 is a deficient number, since it is larger than the sum of its proper divisors (793368307719).

1427987177721 is a wasteful number, since it uses less digits than its factorization.

1427987177721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231325 (or 231322 counting only the distinct ones).

The product of its digits is 19361664, while the sum is 63.

The spelling of 1427987177721 in words is "one trillion, four hundred twenty-seven billion, nine hundred eighty-seven million, one hundred seventy-seven thousand, seven hundred twenty-one".